The president was Ronald Reagan
In factories- it was rough, everyone is on a handful of hours of sleep, they barely got paid, and when children were working in the factories, they would hurt themselves a lot.
All the men were fighting in the war. Im not sure how it was solved though sorry
With the increased use of machines during the Industrial Revolution, productivity Skyrocketed.
Gupta ruler came to an end mainly due to Attacks from the outside
So the answer is C. Attacks from the outside